Mine car



L.,LMQUIST MayV 5, 1931.

MINE CAR Filed oct. 5, 192s 2 Smets-sheet' 1 M/l/f rafa,

May 5, 1931. L. ALMQUIST 1,803,376

MINE GARf Filedoct. 5,..1928 2 shams-sheet 2 Patented May'S, 1931 p UNITED s'rii'ras4 PArElai;l OFI-lcs LEOPOLD ALMQUIST, OE JERsEY crrY, NEW JERSEY, AssroNOR `:ro AmmIcAN OAR AND EOUNDRY COMPANY, or NEW YORK, N. Y., A CORPORATION or NEW JERSEY MINE OAR Application led October 5, 1928. Serial No. 310,855.-

This invention relates to drop bottom mine cars of kthe type in which one door `automatically operates the latch of a second door to release or lock the second door as the first door is lowered or raised, and it is an object of this invention to provide improved means for hinging and locking doors of mine cars.

of the type described which will be of simple and rugged construction, of Jfew parts readily 1o applied, reliable in operation and easily main- Itained in serviceable condition where extensive rep air shops are not available.

Other objects and advantages of this invention will be apparent from the 'following description tgken in conjunction with the accompanying drawings in which:

Figure 1 is a broken view sho-wing, partly in side elevation and partly in central longitudinal section, a mine car constructed in accordance with this invention:

Fig. 2 is a partial end elevation looking from the left in Fig. 1;

Fig. 3 Iis a vertical longitudinal section taken at one of the car axles Online 3--3 of Fi 4, and showing the door hinging and loc ing means with the doors in closed position;

Fig. 4 is an elevation of the structure shown in Fig. 3, parts being broken away to show other parts more clearly and the door being shown in open position; l

Fig. 5 is a fragmentary view showing in elevation the hinging of the door latch to the .car axle;

Fig. 6 is a fragmentary view showing the hinging of the dumping door to thebody structure;

Fig. 7 is an end elevation of the door latch shown detached from the car;

Fig. 8 is a view similar to Fi'g. 3 with the doors in open position; Fig. 9 is a View similar to Fig. 3 showin the manner in which the door is assembled -with the car body; and

modified construction. Y

In the drawings, th'e invention is shown applied to a mine car comprising a body 1 carried upon wheels 2mounted. on axles 3 v Fig. 10 is a view similar to Fig. 3 of a.

which extend through thebody of the car and brackets 12 carried by the endsill 14 and held in closed position by a' latch 16` operated by the adjacent door 8. The door 8 is in turn held in closed position by the latch 18 which is identical in construction with the latch 16 and is operated by the adjacent door 10. Thev door 10 is held in closed position by latches 2O which engage lugs 22 projecting from the free edge 0f the door; the latches 20 being joined by a connecting bar 24 and pivotally mounted on the end sheet 26 of the car body.l One of the latches .20-is provided with an outwardly projecting arm 28 which is operated by engagement with a track ramp, not shown. As the latches 16 and 18 are identical in structurefand operation, and as the method of hinging the doors 8 and 10'is identical, a description of but one of each of these parts will be given.

As shown in Figs, 1, 3 and 4, to the sills 5 there are secured hinge brackets 30 provided with opening's through which pass the axles 3 and with inwardly projecting ribs 32 the lower portions 34 of which are shaped to form bearings for supporting the doors. To the hinge edge of the doors 8 and 10 are attached hinge straps 36 provided with outwardly projecting trunnions 38 which seat in the bearingA surfaces formed by the portions 34 of the ribs 32 and with inwardly projecting lugs 40 mounted eccentrically to the axes of the trunnions 38. Thelatches 16 and 18 comprise angular plates 42 which extend the full width 'of the free edges of the doorsI and are pivotall attached by hinge straps 44 to the axles 3. gecured to the latches at each hinge strap are brackets or braces 45'shaped to conform to the plates 42 and provided with outwardly projecting ianges 46 having laterally Vprojecting ribs 48 of substantially.

inverted U-shape so as to form slots open at their lower ends. The ribs 48 are engaged by the lugs 40 on the hinge straps 36 when the i doors and latches are assembled in the car.

' The upper portions of the ribs 32 are formed in substantially inverted U-shape as at 50 extending over the aXles 3 and of greater projection than the lower portions of the ribs 32, and the portions 5() of the opposite hinge brackets are connectedby braces 52 shaped to fit the portions 50 of the ribs 32 and formed with outwardly projecting flange portions 54 and 56 which extend out over the latch and the edge of the door supported thereby and over the hinge edge of the door mounted on v of the bearing portion 34 and portion 50 of the rib 32, this portion of the rib32 being omitted in order to provide a slot through which the trunnions 38 may be entered. It will be noted, however, that in the extreme yposition to which thedoors 8 and 10 will swing in service, as shown in Fig. 8, that the ribs 48 prevent the trunnions 38 being displaced from the bearing portions 34 of the ribs 32. As an additional precaution, bolts 59 may be inserted in openings in the sills 5 and hinge brackets 30 in position to retain the trunnions 38 in the bearing portions `34.

In the modified construction as shown in Fig. 10, the latch 16 is mounted as is the latch 16 in Figs. 1 and 3, but the rib 32 of the hinge bracket 30 is made continuous and is formed inthe lower portion with a circular bearingopening 60 to receive the trunnion 38 of the hinge straps 36. In assembling this construction, it will be necessary'to insert the trunnions 38 in the bearing openings 60 before the hinge straps 36 are attached to the doors.

In operation, the latches 20 will be operated b the engagement ofthe arm 28 against a track ramp (not shown) as the car moves forward or to the right in Fig. 1. Operation of the arm 28 willpermit the door 10 to drop, whereupon the lugs 40 through their engagement with the rib 48 will operate the latch 18 withdrawing the latch 18 from beneath' the edge of the door.8 as the door 10 is dropped. Releasing the door 8 will permit thisdoor to drop, which operation will in turn operate the latch 16 releasing the door- 6 and permitting this door to drop. The doors are returned to raised position by engagement with a track'device (not shown) which operates to raise the door6 first as the car moves along the track. The door 8 is subsequently raised, and raising the door 8 operates the latch l16 to holding position beneath the edge of the door 6. The door 10 is afterwards raised and this in turn opcrates to place the latch 18 beneath the edge of the door 8. Raising the door 10 will place the lug-s 22 in engagement with the latches 20, the latches 2O being returned to their locking position by gravity or by a suitable yielding device, not shown.

What is claimed is:

1. In a drop bottom mine car, a dumping door pivotally mounted on the car, a pivotally mounted latch for holding said door in closed position, said latch having laterally projecting ribs forming open-ended slots thereon, a second drop door, hinges for attaching said second door to said car and lugs 'carried by said hinges and engaging in said slots tovoperate said latch.

2. In a drop bottom mine car, a dumping door pivotally mounted on the car, a pivotally mounted latch for'engaging the free edge of said door for holding said door in closed position, said latch having laterally projecting ribs forming open-ended slotsthereon, a second drop door, hinges for attaching said second door to said car and lugs carried by said hinges and engaging in said slots to operate said latch. 'A

3. In a drop bottom mine car, a bottom dumpingdoor pivotally mounted on the car,

a pivotally mounted latch for holding said door in closed position, a second 4bottom dumping door., hinges for supporting said second door and laterally projecting lugs operating with said hinges and engaging said latch to operate said latch upon operation of said second door.

4. In a drop bottom mine car, a bottom dumping door pivotally mounted on the car, a pivotally mounted latch engaging the free edge of said door to hold said door in closed position, a second bottom dumping door, hinges for mounting said second door, and laterally projecting lugs carried by said hinges and engaging with said latch to operate said latch to release said first door upon opening of said second door.

5. In a drop bottom mine car, a dumping door pivotally mounted on the car, a latch V -for engaging the free `edge of said door for holding said door in closed position, hinges for supporting said latch, blockscarried by said hinges having open-ended slots, a second drop door, h1nges for attaching said `ried by said hinges having .open-ended slots,

a second drop door, hinges for attaching said second door to said car and lugs carried by said hinges and engaging in saidslots to operate said latch.

straps for engaging in said slots and operating said latch.

8. Ina drop bottom mine car, a dumping door pivotally mounted on the car, a ivotally mounted latch for holding said oor in closed position, said latch having openended slots therein, hinge brackets having openings mounted on the car, a second dumping door, hinge straps attached to said second door, trunnions on said hinge straps for engaging with said hinge brackets through said openings and lugs on said hinge straps engaging in the slots on said latch to operl ate said latch.

9. In a drop bottom mine car, a dumping door pivotally mounted on the car, a plvotally mounted latch for holding said door in closed position, 1a second dumping door, hinge straps attached to said second door, trunnions on said hinge straps,hinge brackets mounted on said car having projecting'ribs forming bearing surfaces for supporting said trunnions, said ribsA having openings for the insertion of said trunnions, and lugs on said hinge straps engaging said latchto operate said latch.

10. In a drop bottom mine car, hinge brackets mounted on said car and having projectin ribs forming bearing surfaces, a

dumping door, hinge straps attached to said 40 door and outwardl projecting trunnions on said hinge straps or engaging said bearing surfaces, said ribs having openings for .the insertion of said trunnions.

11. In a drop bottom mine car, hinge brackets mounted on said carI and having projecting ribs forming bearing surfaces, a dumping door, hinge straps attached to said door, outwardly projecting trunnions on said hinge straps for engaging said bearin surfaces, said ribs having openings for te insertion of said trunnions and means connect- 'ing the ribs of opposite hinge brackets. A.

12. In a dr ottom mine car, a dumping door a latch or said door, al second dumpingdoor,

' jectin door, in

brackets on said car having prosaid trunnions and a guard for said latch hingestraps having'outwardly pro-- trunnions attached to saidl second jecting ribs forming vbearing surfaces for hinge straps for engaging said bearing surfaces and means retaining said trunnions in engagement with 'said bearin surfaces.

14:. In a drop bottom mme car, hinge brackets mounted on said car and having projecting ribs forming hearing surfaces, a

dumping door, hinge straps attached to said door, outwardly projecting trunnions on said hinge straps for engagingsaid bearin surfaces, said ribs having openings for t e insertion of said trunnions and means preventing displacement of said trunnions from said bearin surfaces. 'A

15. n a mine car, a dro door pivotally mounted on the car, alatc for said door, said latch having a rib forming an` openended slot, a second drop door, and a hinge for attaching said second door to the car, y

ysaid hinge having means operatively engaging in the slot formed by said rib to operate said latch. 16. In a mine car, a dro door pivotally mounted on the car, a latc for saidv door, said latch having a laterally proj ecting` flange of arcuate form, a second drop door, and a hinge for attaching said second door to the car, said hinge'having means engaging said flan-ge to operate said latch.

17 In .a mine car, a dro door pivotally mounted on the car, a late for said door, said latch having a brace provided with a laterally projecting arcuate ange ormin an open-endedslot, a second drop door, an a hinge for attaching said second drop door to the car, said hinge havintg means engaging in the slot formed by sai ange to operate said latch.

18.7In a mine car, a drop door pivotally erating with said hinge straps and engaging in said slots to operate said latch.

In witness whereof I have hereunto 'set my hand. V

LEOPOLD ALMQUIST.

brackets. mounted on said car and having umping. door, hinge straps attached to said forming bearing surfaces, a

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